Lock



N. C. SPRHQGER LOCK Filed Nov 1924 2135 Iii INV ENTER Patented Mar. 9,1926.

UNITED STATES PATENT GFFICE.

WILLIAM CHARLES SPRINGER, OF BELLEVILLE, ONTARIO, CANADA.

' LOCK.

Application filed November 28, 1924. Serial N 0. 752,630.

To all whom it mag concern:

sive construction of the latch operating mechanism and, where a deadbolt'is employed in the lock, to utilize a single spring for the tumblerof the dead bolt and for the return of the latch operating mechanism tonormal position.

I attain my objects by means of the con+ structions hereinafterdescribed and illustrated in the accompanying drawings in Eig. 1 is aside elevation of a'lock constructed in accordance with my inventionwith the detachable side plate removed; and

Fig. 2 a side elevation of the latch bolt and its operating mechanismlooking downward.

In the drawings like numerals of reference indicate corresponding partsin the different figures.

The lock casing, as usual, comprises a stationary pla e 1 provided withthe integral rim .2 and the face plate 3, the latter being formed withthe usual apertures for the passage of the latch bolt 4 and dead bolt 0.and a recess 7 in its rearend adapted 'to partly receive the coil spring8 which bears against the adjacent part of the rim 2. This spring tendsto maintain the latch bolt in its normally extended position. 9 is thespindle hub rotatably mounted as "usual in the fixed side plat-e 1 andthe removable side plate 10 of the lock casing. The hub is provided withthe usual projections 11 for oper- ,ating the latch. 12 is the latchlever, which is fulcrumed intermediate its ends onthe stump 13 and isprovided with a pin 1 proj ecting into the slot 6 of the latch bolt.Normally the pin lies at the rear end of the slot 6 so that the latchbolt is free to recede when the bevelled end of the latch contacts witha keeper when the door to which the lock is connected is closed. The endof the latch lever opposite the pin 14 is engaged by a link 15 which isalso engaged by one of The latch bolt is formed witha slot 6- the hubprojections ,11. The latch lever is provided with a third arm 16 withwhich engages the lower hub projection 11. Thus, when the hub is rotatedin one direction, the latch lever is rockedto throw back the latch bythe direct engagement of the hub with the latch lever and when the hubis rotated in the opposite direction, the latch lever is rocked throughthe medium of the link 15.

The link 15 is preferably constructed as follows. Theend 17 underliesthe upper end of the latch lever '12, which is rabb-eted tofit over thisend. latch lever underlies the adjacent hub prejection 11 also rabbetedto overlie this end. Shoulders 18 and 19 are formed on the link forengagement by the latch lever and hub projection respectively. A thirdshoulder 20 is preferably formed on the link, the end of the latch leverlying between the shoulders 18 and 20 sothat the link will always followthe movements of the latch lever in either direction. The link also liesbetween the adjacent part of the rim 2 and the hub 9." vVith thisarrangement no specially constructed guide is necessary for the link. Asthe latch'bolt has a pin and slot engagement with the latch lever, noother guide or support is necessary for the rear end of the latch bolt.The coil spring 8 is made only of sufiicient strength toreturn the latchbolt to its normal position after it has been pushed back by engagementwlthth-e keeper as herembefore referred to, and it is not desirable thatit be made of sufficient strength to also turn the latch lever andspindle hub to their normal positions. For this purpose I provide another spring which serves also the purpose of tending to maintain thetumbler of the dead bolt in its normal position. The dead bolt is formedwith a slot 21 through which extends the stump 22 which thus forms aguide for the bolt. On this stump is fulcrumed the tumbler 23 which, asusual, is provided with the projection 24 adapted to lie on either sideof the projection 25 on the dead bolt, so that thetumbler serves to lockthe dead bolt either in its extended or retracted position. A projection26 is also formed on the tumbler and a projection 27 on the latch lever.A bent spring 28 engages these projections and. the stump 22. Thisspring thus serves the dual purpose hereinbefore referred to.

The other end of the i guided From the above description it will be seenthat I have devised a very simple and inexpensive lock, since only twostumps are required and no special guides or other fittings for theparts of the lock.

What I claim is 1. In a lock the combination of a casingf a latch boltslidable in the lock casing; a

spindle hub journalled in the lock casing, provided with latch leveractuating pro ections; a latch lever fulcrumed intermediate 7 of itsends; a pivotal connection between one end of the lever and the latchbolt; a sliding link forming an operating connection be tween theopposite end of said lever and one of the hub projections; and an arm011 said lever adapted for engagement by the other hub projection.

2. In a lock the combination ofa casing having front plate aperturedforthe pas sage of a latch bolt; a spindle hub j ournalled in the casingprovided with latch lever ongaging projections; a latch lever fulcrumedintermediate of its ends; a pivotal connec-i tion between one end of thelatch lever and therlatch bolt, said connection forming the sole supportfor the rear end of the latch bolt; a sliding link forming an operatingconnection between the opposite end of said lever and one of the hub proections; and an arm on said lever adapted for engagement by the otherhub projection.

23. In a lock thecoinbination of a casing;

a latch bolt slidable in the casing; a latch lever fulcrumedintermediateof its ends; a

engaged by one of the hub projections; and a sliding link havingshoulders engaging respectively the other liub projection and anotherarm of the latch lever.

5. In arlock thecoin'bination of a casing; a spindle hub journalledtherein provided with latch lever engaging'projectlons; a

latchlever fulcru ned in the casing directly engaged by one of the hubprojections; and

a sliding link having shoulders spaced 1nwardly from its endsengagingrespectively theother hub projection and another arm of the latch lever,said latch lever and hub projection being rabbeted to overlie the endsof vthe link.

6. In a lock the combination of acasing; a splndle hub ournalled there nprovided with latch lever engaging projections; a latch lever fulcrurnedin the casing directly engaged by one of the hub projections; a slid nglink having shoulders spaced inwardly from its ends engagingrespectivelythe other hub'projection and another arm of the latch lever, said latchlever and hub projection being rabbeted ito'overlie the ends of thelink; and aflflange on the casing parallel to sa d l nk retain ng itimpos tion relative to the hub and latch lever.

7. :Iiia lock the combination of a stump;

a latch lever 'fulcruined on the stnnip; a

dead bolt lock tumbler; alatch bolt posifitioned betweentheatoresaidstuinp and the tumbler and havinga pin-and-slot connection withthe latch lever; a stump on which said tumbler is fulcrnined; bentspring engaging the last mentioned stuinp and having one end engagingthetumbler and the other end extended.acrosslthe latch bolt and engagedwith the latch lever; and ,a' second spring engaging the latch bolt anda stationary part tendingtoe end the said latch bolt, wherebytlielatchbolt' may moveback againstspring pressurewithout moving theOctober, 192%}.

WILLIAM CHARLES srninenn.

latch lever and the first mentioned spring-,1

Signed at Belleville, this 24th day of

